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The man/woman one stuck out to me as well. I probably watched it ten times. Probably because it seems so forlorn.

The mosaics of a duck and a rabbit, however, was hilarious.

I’m not sure whether ‘orthogonal transformations’ in this context refers to the usual orthogonal linear transformations (/matrices), but if so then yes.

The article explicitly specifies orthogonal matrices.

I saw that, but I’ve come across strange reuses of terminology before so I didn’t want to assume.